Reproducible Builds

I'm just trying to set up verification of Reproducible Builds for Amaze, but I got stuck – I guess due to missing details. Build currently fails with:

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':file_operations:cargoBuildArm'.
> Process 'command 'cargo'' finished with non-zero exit value 101

The build recipe used (running in a Podman container with Debian bookworm, OpenJDK 17, and NDK 28.2.13676358 (aka 28c)):

build:
  - sed -r '/signingConfigs.release/d' -i app/build.gradle
  - RUST_TOOLCHAIN="1.92.0"
  - RUSTUP_VERSION="1.28.2"
  - git clone https://github.com/rust-lang/rustup.git -b $RUSTUP_VERSION
  - export ANDROID_NDK=/opt/sdk/ndk/${PROVISIONING_NDK}
  - ${BUILD_REPO_DIR}/rustup/rustup-init.sh -y --default-toolchain=$RUST_TOOLCHAIN --target armv7-linux-androideabi --target aarch64-linux-android --target i686-linux-android --target x86_64-linux-android
  - source $HOME/.cargo/env
  - pushd file_operations
  - chmod +x setup_rust_android.sh
  - ./setup_rust_android.sh
  - rustup target list --installed | grep android || { echo "No Android targets found"; exit 1; }
  - if ! test -f .cargo/config.toml; then
  - echo "❌ .cargo/config.toml missing"
  - exit 1
  - fi
  - popd
  - chmod +x gradlew
  - ./gradlew assembleFdroidRelease

For several things I had to make assumptions, as your repo doesn't state (or I didn't find it), e.g. the Rust toolchain and Rustup versions used (other projects have that in some toolchains.toml). I also don't (yet) know the build path, which will be important here for RB to succeed.

Can you please give me some pointers? Thanks in advance!

Start by reviewing app/build.gradle, file_operations/setup_rust_android.sh, and any existing .cargo/config.toml, then run the provided Podman/Debian build recipe through ./gradlew assembleFdroidRelease. Check how the Rust toolchain, Android targets, NDK, and build path are defined. Done means the documented setup supports the requested reproducible-build verification without the cargoBuildArm failure.